/*
 * Copyright 2010-2011 CGT&DC ISA RAS
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package websolve.workflow.runtime.test.mapreduce;

import java.util.Map;

import websolve.workflow.runtime.Workflow;

public class MapReduceTask extends Workflow {

    public MapReduceTask(String name) {
        super(name);
        addInput("in");
        addOutput("out");
    }

    @Override
    public void run() {

        Map input = (Map) getInputValue("in");
        int mapsNum = input.size() / 2;

        SplitTask split = new SplitTask(getName() + "_split", mapsNum);
        split.setInput("in", getInput("in"));
        addTask(split);

        TestReducer reduce = new TestReducer(getName() + "_reduce", mapsNum);

        for (int i = 0; i < mapsNum; i++) {
            TestMapper map = new TestMapper(getName() + "_map" + i);
            map.setInput("in", split.getOutput("part" + i));
            addTask(map);
            reduce.setInput("in" + i, map.getOutput("out"));
        }

        addTask(reduce);
        setOutput("out", reduce.getOutput("out"));

        super.run();
    }

}
